holder



(No Model.) I Z SheetB- Sheet 1,-- A.R.HOL DER.

. ELEVATOR. I No. 486,161. 7 Patented Nov. 15,1892.

n H \J] m fflessesp Q Inuenilr W fimaza M2 44 Q 2 1 UNITED STATES PATENTOFFICE.

ALFREDO RAMONEDA HOLDER, OF BAROELGNA, SPAIN, ASSIGNOR TO THE SOCIETYEDOUX ET CIE., OF PARIS, FRANCE.

ELEVATOR.

SPECIFICATION forming part of Letters Patent No. 486,161, dated November15, 1892.

Application filed September 4, 1891- Serial No. 404.703- (No model.)Patented in Spain February 14, 1891, No. 11,688.

To all whom it may concern.-

Be it known that I, ALFREDO RAMONEDA HOLDER, a subject of the King ofSpain, and

a residentof Barcelona, in the Kingdom of Spain, have invented certainnew and useful Improvements in Elevator-Brakes, (patented in Spain,February 14, 1891, No. 11,688,) of which the following is a full, clear,and exact description.

This invention relates to elevator-brakes, and has for its object asimple and efficient brake device, dispensing with the lever and pawlappliances heretofore employed.

In the accompanying drawings, forming part of this specification, Figure1 is a detailed elevation of an elevator car and guides,

a portion being shown in section to more clearly illustrate myinvention. Fig. 2 is a like View, the parts being represented in aslightlydifferent position; and Fig. 3 is an enlarged detail View moreclearly showing my improvements.

My improved elevator-brake is composed of two parts: a movable part a,fixed to the car and moving with the same, and a stationary part 19,secured on one of the guides or rails in the elevator-shaft. The movablepart a consists of a box-like casting provided with a series of cavitiesor recesses a, in each of 0 which is a sphere or ball 0. The diameter ofeach sphere is substantially equal to the area of the cavity in which itis located. The stationary part b is provided on its inner side with aseries of rack teeth 1), extending 3 5 through its length, and therecesses or notches presented by these teeth are of a depth equal to orabout the diameter of each of the spheres.

The walls of said notches or recesses are inclined, the inclination,like those of the recesses of the movable piece, being determined byprevious calculation, so as to control or regulate in advance the degreeof speed at which the car will be normally capable of.

For instance, the parts being in the position 5 shown, it is obviousthat as long as the car descends at a speed not exceeding a determineddegree of velocityeach sphere will by its own weight follow the movementof the car and pass alternately from the recess in the movable part withthe corresponding recess in the rack, and vice versa,therebyin no wayinterfering or obstructing the descent of the car. Should, however, thedegree of descent exceed the determined limit, each sphere would nothave sufficient time to pass from 5 one recess into the other, and hencewould become wedged between the upper wall of the cavity of the movablepart and the lower wall of one of the notches in the rack. It is quiteapparent, therefore, that such a safety device can always be relied uponand is of very simple character. Furthermore, it does not have the objectious incident to those arrangements wherein the rupture of thesuspending-cable is relied upon to throw the brake appliance intooperation, for in the latter class of devices the too-free unwinding ofthe drum'at the time when the car is rapidly descending would preventthe safety appliances from being actuated.

I claim- In a safety device for elevators, the combination of a fixedrack provided with recesses, a recessed casting secured to the side ofthe car, and a loose sphere located in the recess of said casting andadapted when the elevator descends at a normal degree of speed toalternately pass from the recess in the casting to those in the rack,and vice versa, but to become wedged between the walls of the So castingand rack when the descent of the car becomes excessive, substantially asset forth.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

ALFREDO RAMONEDA HOLDER. Witnesses:

J osE PLAYA SUSIE,- HERBERT W. BOWEN,

U. S. Consul.

